Writing, “Okay, here it is. Please don’t start flame wars over it, but this year I’d like to apologise for killing (whispers)… Snape. *Runs for cover*”, the author announced that she was sorry for killing off the potions teacher.

OK, here it is. Please don't start flame wars over it, but this year I'd like to apologise for killing (whispers)... Snape. *runs for cover*